117989136971 has 4 divisors (see below), whose sum is σ = 123119099472. Its totient is φ = 112859174472.

The previous prime is 117989136959. The next prime is 117989136997. The reversal of 117989136971 is 179631989711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117989136971 - 2²² = 117984942667 is a prime.

It is a super-2 number, since 2×117989136971² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117989139971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564981216 + ... + 2564981261.

It is an arithmetic number, because the mean of its divisors is an integer number (30779774868).

Almost surely, 2^117989136971 is an apocalyptic number.

117989136971 is a deficient number, since it is larger than the sum of its proper divisors (5129962501).

117989136971 is an equidigital number, since it uses as much as digits as its factorization.

117989136971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129962500.

The product of its digits is 5143824, while the sum is 62.

The spelling of 117989136971 in words is "one hundred seventeen billion, nine hundred eighty-nine million, one hundred thirty-six thousand, nine hundred seventy-one".